A 14 foot boat with a 90 on it sounds WAY overpowered to begin with. Most 14 foot boats are rated for 20 to 25 horsepower-- some as much as 40. Best advice, unless you have a death wish, is to check the boats data plate for its maximum rated power and don't exceed it.hi i have a 94 boston whaler rage 14, with a 90hp jonrude v4 in it. the boat seems way underpowered, but i have a evinrude gt150 v6 just sittin around i was wondering will that engine fit on that adaptor plate?